Multiple Choice Questions on A two digit number is four times the sum of its digits If 27 is added then it becomes seven times th........... for RRB(NTPC) Exam Preparation

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Multiple Choice Questions

A two digit number is four times the sum of its digits If 27 is added then it becomes seven times th...........

Quantitative Aptitude (RRB NTPC) Number System
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    A two digit number is four times the sum of its digits. If 27 is added then it becomes seven times the sum of its digits. The two digit number is

    24

    Incorrect Answer

    12

    Incorrect Answer

    48

    Incorrect Answer

    36

    Correct Answer
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    Explanation:

    Let the two digits number be (10x + y)
    Given that,
    10x +y = 4(x + y)
    6x =3y
    y=2x
    According to the question,
    (10x + y)+ 27 = 7(x + y)
    3x + 27 = 6y
    By putting y = 2x
    x = 3
    y=6
    then the number is (10x + y)= 30+6 = 36

    By: Barka Mirza
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